Ventriloquist

google

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mid 17th century: from modern Latin ventriloquium (from Latin venter ‘belly’ + loqui ‘speak’) + -ist.

wiktionary

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ventriloquy +‎  -ist

etymonline

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ventriloquist (n.)

1650s in the classical sense, from ventriloquy + -ist. In the modern sense from c. 1800. Ventriloquists in ancient Greece were Pythones, a reference to the Delphic Oracle. Another English word for them was gastromyth.